See 16.1 in https://www.facebook.com/legal/terms
Also, although the EU has strict data retention and data-export laws, you agreed to give up when you signed up for Facebook because Facebook keeps its data in the US.
Anyone outside the US and Canada is doing business with Facebook Ireland Limited. They are bound by Irish law.
Again, if local law (or a jury nulification) trumps this, FB are SOL.
In civil law if the jury completely disregarded the facts / the law to the point that the judge believes that no reasonable jury could have reached the decision they did, the judge would be likely to enter a judgement not withstanding verdict whereby he or she basically says "I know what the jury said but they're wrong".
https://en.wikipedia.org/wiki/Judgment_notwithstanding_verdi...
I'm not sure how much faith I put in juries, but sometimes they do the right thing.